CN103109378B - The photovoltaic cell component improved and method - Google Patents

The photovoltaic cell component improved and method Download PDF

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Publication number
CN103109378B
CN103109378B CN201180044936.9A CN201180044936A CN103109378B CN 103109378 B CN103109378 B CN 103109378B CN 201180044936 A CN201180044936 A CN 201180044936A CN 103109378 B CN103109378 B CN 103109378B
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layer
conducting element
photovoltaic cell
conductive
battery
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CN103109378A (en
Inventor
M·W·德格鲁特
M·E·米尔斯
T·J·帕尔森斯
N·拉梅施
M·斯坦普基
D·J·沃辛
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Dow Global Technologies LLC
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Dow Global Technologies LLC
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/06—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier
    • H01L31/072—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PN heterojunction type
    • H01L31/0749—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PN heterojunction type including a AIBIIICVI compound, e.g. CdS/CulnSe2 [CIS] heterojunction solar cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/541—CuInSe2 material PV cells

Abstract

The invention provides the photovoltaic cell component of a kind of improvement (10), it includes at least multiple photovoltaic cell (20). Described battery includes light activatable moieties (24), it is interposed between top conductive structure (28) and relative conductive basal layer (22), and described top conductive structure (28) is positioned at the top surface leaving exposure on some region of the top surface (28) of described light activatable moieties on other regions. The photovoltaic cell component of described improvement also includes the first encapsulating material layer (40) that multiple conducting element (80) contacts and the second encapsulating material layer (50) contacted with described relative conductive basal layer with the top surface of described top conductive structure and the exposure of described light activatable moieties, and conducting element is held in battery layers by described encapsulating material.

Description

The photovoltaic cell component improved and method
Priority request
This application claims the rights and interests of the applying date of U.S. Provisional Application number 61/383,867 (JIUYUE was submitted on the 17th in 2010), the content of described U.S. Provisional Application is incorporated herein by with it in full at this.
Invention field
The present invention relates to the photovoltaic of improvement (PV) battery component, more particularly, to the photovoltaic cell component of the improvement not using solder or conductive adhesive to be interconnected by multiple batteries.
Background technology
Photovoltaic article generally comprises the photovoltaic cell of multiple electricity interlinkage. In addition to ensuring that outside electricity interlinkage, the damage that these batteries are wrapped up to protect the battery against operation sometimes or environment causes. The conventional method of photovoltaic cell electricity interlinkage is so-called string-contact pin (string&tab) method, wherein use the flat wire (bus) of stannum or solder-coated to be connected with each other by solaode, and bondd by soft soldering and/or other adhesive materials such as conductive epoxy resin. Ribbon conductor is generally bonded to the busbar position on the conductive grids putting on battery surface. It is believed that the cross section of wire is likely to be restricted, because thicker electric wire excessively rigidity, and the electric wire of Bao Hekuan blocks too much light. Final result is interconnection resistance loss and the amount of battery-active surface area that stopped by ribbon conductor is likely to result in the significantly reducing of performance of photovoltaic cell component (and therefore PV device). Series-mounting is likely to also be difficult to use in thin battery, because the serial battery string obtained is likely to frangible, and is prone to the forfeiture occurring PV band to contact with solaode. Additionally, the outward appearance of big total line on PV apparatus surface is attractive in appearance not for being likely to client.
The document relevant with this technology includes following patent file: U.S.6,936,761, U.S.7,022,910, U.S.7,432,438, U.S. announce 2007/0251570,2009/00025788 and 2009/0255565, and all documents are that all purposes are incorporated herein by.
Summary of the invention
The present invention relates to the photovoltaic cell component of improvement, it solves at least one or more problem described in preceding paragraphs.
It is believed that a present invention potential advantage compared with prior art is that the photovoltaic cell component of the present invention carries out constructing and configuring in the way of not needing conductive adhesive and/or solder battery strings to be kept together. Contemplate during applying conductor wire or immediately battery strings be encapsulated in polymer multilayer structure (laminate) after applying conductor wire. Cancel conductive adhesive to be probably desirably, because conductive adhesive is probably costliness and it needs to considerably long downtime is to carry out safeguarding and cleaning. The toleration to thermal cycle and the raising of humid heat treatment that contemplated another advantage can be an advantage over adhesive or soft soldering connects, adhesive or soft soldering are connected under the ambient pressure of these types and are prone to degraded. Photovoltaic cell component described herein is also absent from the big total line hindering light to enter battery. Being absent from bus also to make PV device more attractive aesthetically compared with the conventional products using string-contact pin mode to prepare. Additionally, make to reduce the amount of silver conductive ink in grid application by eliminating the big silver-colored busbar being commonly used to photovoltaic cell component prepared by use string-contact pin mode in this way. Another beat all advantage of this method is probably, use solaode string (such as multiple batteries that the present invention assembles, such as 5 battery components/string) it is likely to repeatedly show the efficiency higher relative to the single battery in producing for it and generate electric current and less series resistance, because relative to the single battery without conducting element, add conducting element and reduce resistance. On the contrary, as what the EXPERIMENTAL EXAMPLE discussed below in this specification was seen, 5 battery strings connected with strip-like flat line and conductive epoxy resin show contrary trend, have relative to the single less efficiency of composition battery and electric current and higher series resistance.
Therefore, according to an aspect of the present invention, contemplate a kind of photovoltaic cell component, it includes at least multiple photovoltaic cell, described battery includes at least: light activatable moieties, it is interposed between top conductive structure and relative conductive basal layer, and described top conductive structure is positioned at the top surface leaving exposure on some region of the top surface of described light activatable moieties on other regions, and at least some of form peripheral edge portions of wherein said battery includes non-conductive layer part; Multiple conducting elements; The first encapsulating material layer contacted with the top surface of described top conductive structure and the exposure of described light activatable moieties; And the second encapsulating material layer contacted with described relative conductive basal layer; The top surface of top conductive structure and described exposure described in the end thereof contacts of wherein said multiple conducting element, with the conductive basal layer that the end opposite of the plurality of conducting element contacts adjacent photovoltaic cell, and two ends all by corresponding encapsulating material layer keep contact with battery layers.
The present invention can further with one of features described herein or its any be combined as feature, described feature such as current collecting, it includes a series of substantially parallel line of material (it has relatively low sheet resistance compared with the top surface of described exposure); Described a series of substantially parallel line is generally orthogonal to the direction of the plurality of conducting element; The number of described conducting element and the cross-sectional width of described conducting element being chosen so that according to following equation, the overall power loss caused due to the line resistance of described conducting element and the concealment (shading) of described conducting element is lower than 6%:
Overall power loss=[power loss caused by concealment]+[being lost the power loss caused by impedance line]
=[{ �� (I/n) (l) }/(V) (A)]+[n (l ') (d)]
Wherein �� is the resistivity of conducting element, I is the electric current produced by PV device, n is the number of conducting element, l is the length of conducting element, V is the voltage produced by PV device, A is the cross-sectional area of conducting element, and l ' is the length that conducting element covers the top surface of PV battery, and d is the diameter of conducting element; The total surface area of described current collecting and the plurality of conducting element less than PV battery total surface area 4%; By covering the power loss caused between the 30-70% of the overall power loss caused by concealment and ohmic loss; The cross-sectional width of described conducting element is more than the thickness of described first and second encapsulating material layer; The cross-sectional width of described conducting element is less than 0.5mm and more than 0.1mm; Described conducting element is connected on the end bar at described assembly two ends place; Described conducting element is by soft soldering or is solder-connected to described end bar; Described conducting element is connected to end bar by laser weld; Described first encapsulating material layer and described second encapsulating material layer include multiple layer, and wherein the ground floor closest to battery top and lower surface is the thermoplastic with the fusing point higher than succeeding layer; Described top surface comprises transparent conductive oxide; Described photovoltaic cell component comprises at least 5 photovoltaic cells and at least 3 conducting elements; Described photovoltaic cell component comprises at least 10 conducting elements; The described conducting element length overlapping with described conductive basal layer is at least 2.0mm; Described non-conductive layer part comprises the liquid dielectric by UV radiation curing; Described first encapsulating material layer, described second encapsulating material layer or both include at least the first and second layers, wherein said ground floor has the fusion temperature (T higher than the described second layerm); The difference of fusion temperature (Tm) is at least 10 DEG C.
Therefore, according to another aspect of the present invention, it is contemplated to a kind of method forming photovoltaic module, described method at least comprises the steps: to provide the first encapsulating material layer and the second encapsulating material layer; A series of substantially parallel conducting element is provided; Multiple photovoltaic cell, described photovoltaic cell is provided to include photoactive layer, relative conductive basal layer and the top conductive layer comprising transparency conducting layer and current collecting; The plurality of photovoltaic cell is connected in connected head-to-tail mode; Described current collecting comprises a series of substantially parallel line, the form peripheral edge portions of described battery includes non-conductive layer part, transparency conducting layer described in the end thereof contacts of the plurality of conducting element and described current collecting, and the conductive basal layer of the end opposite contact adjacent photovoltaic cell of the plurality of conducting element, and two ends are all contacted with battery layers by the maintenance of corresponding encapsulating material layer.
It should be appreciated that aspect above-mentioned and example are nonrestrictive, because as shown in this article with described, there is also other aspect and example in the present invention.
Accompanying drawing explanation
Fig. 1 is the top perspective of one exemplary embodiment of the present invention.
Fig. 2 is the side view of the embodiment shown in Fig. 1.
Fig. 3 is the parts decomposition side view of the embodiment shown in Fig. 1.
Fig. 4 is the more detailed side view of the embodiment shown in Fig. 1.
Fig. 5 is the top perspective of single battery.
Fig. 5 A-A is the detailed section view of the battery of Fig. 5, it illustrates the layer of example.
Fig. 6 is the top perspective of the PV device of the photovoltaic cell component including 4 batteries.
Fig. 7 is the top perspective of embodiment 1.
Fig. 8 is the top perspective of embodiment 2.
Fig. 9 is the top perspective of embodiment 3 and 4.
Figure 10 is the top perspective of embodiment 5.
The graphical examples that Figure 11 is the wire resistance rate relevant to embodiment 5 on the series resistance of battery component and the impact of normalization efficiency.
Figure 12 shows how to minimize the graphical examples of example of power loss (normalization efficiency) by the optimization experiment of conducting element number.
Figure 13 is the table relevant to embodiment 1.
Figure 14 is the table relevant to embodiment 3.
Figure 15 is the table relevant to embodiment 4.
Figure 16 is the table relevant to embodiment 6 and 7.
Figure 17 A-C illustrates the exemplary I-V characteristic of single battery and interconnecting assembly.
Detailed description of the preferred embodiments
The present invention relates to the photovoltaic cell component 10 of improvement as shown in Fig. 1 to Fig. 5 A-A and Fig. 7-10, and may be generally described as the multiple parts playing the function that electric energy is provided when standing solar irradiation (such as daylight) and the fit assembly of part set. In an example, the photovoltaic cell component 10 of improvement can be incorporated in bigger photovoltaic devices, for instance in the solar energy house top board 100 shown in Fig. 6.
The special concern of the disclosure and principal focal point are the photovoltaic cell components 10 of a kind of improvement, it includes at least multiple photovoltaic cell the 20, first and second encapsulating material layer 40,50 and the conducting element 60 (preferably several conducting element 60) electrically connected with photovoltaic cell 20.
In general, multiple photovoltaic cells can by multiple adjacent layer buildings. These layers can by definition (such as from the bottom up) further for including at least: conductive basal layer 22, photoactive layer 24 and top current collecting 28. Furthermore it is preferred that a part of peripheral edge at least along battery includes non-conductive layer part 30 in situation, for instance shown in the diagram.
Additionally, assembly 10 is configured so that one end 62 of conducting element 60 contacts with both top surfaces 26 of current collecting 28 and photoactive layer 24, contact with the conductive basal layer 22 of adjacent photovoltaic cell 20 with the end opposite 64 of conducting element 60. Under preferable case, two ends 62,64 all keep contacting with battery layers by corresponding encapsulating material layer.
Relation (such as at least geometric properties and material character) between imagination parts and part set zoarium is for solving to have beat all importance the one or more problems discussed in background parts above. In paragraph below, in more detail and specifically disclose all parts and part set is fit and relation.
In the present invention, the photovoltaic cell 20 of imagination can be built by commercially available any amount of known photovoltaic cell, or can be selected from the photovoltaic cell of some exploitation in the future.
Conductive basal layer 22
Conductive basal layer 22 plays the function being similar to top conductive layer 24 by light activatable moieties in the electric energy that conduction is produced. Conductive basal layer 22 can be rigidity or flexibility, but is ideally flexible, particularly can be combined with non-planar surface in the embodiment used at the photovoltaic devices obtained. Conductive basal layer can be single integral layer, or can include, from one or more materials by wide scope, the layer that metal, metal alloy, intermetallic complex and/or their combination formed and formed. For needing the application of flexible base layer, layer 22 is generally tinsel. The example includes comprising Cu, Al, Ti, Mo or stainless tinsel. In typical case, this conductive basal layer is formed by rustless steel, and square one-tenth light activatable moieties 24 on the base layer, while it is also envisaged that other configurations and they be not the concept necessarily affecting battery interconnection presented herein. In an exemplary embodiment, rustless steel is preferred.
Conductive basal layer 22 can be coated with the conductive material of wide scope on one or two side, including one or more in Cu, Mo, Ag, Al, Cr, Ni, Ti, Ta, Nb, W and/or their combination. The electrically conductive composition mixed with Mo can be used in an exemplary embodiment. The back contact 122 that next-door neighbour's photoactive layer is formed on conductive basal layer contributes to that photoactive layer 24 and support are separated minimize support composition and moves in photoactive layer. Such as, back contact 22 can help Fe and the Ni composition blocking rustless steel support to move in photoactive layer 24. The conductive metal layer formed on one or two side of conductive basal layer 22 can also protect basal layer to avoid the degraded being likely to cause in photoactive layer 24 forming process; if such as using S or Se in the formation of photoactive region 24, it is provided that for the protection of S or Se.
Light activatable moieties 24
The photoactive layer of photovoltaic cell 20 or part 24 are containing the material that luminous energy is transformed into electric energy. The material of any this function of known offer can be provided, including crystalline silicon, amorphous silicon, CdTe, GaAs, DSSC (so-called Graetzel battery), organic/polymer solar battery, or by photoelectric effect, sunlight is transformed into any other material of electricity. But, photovoltaic cell is preferably based on the battery of IB-IIIA chalcogenide, for instance IB-IIIA selenides, IB-IIIA sulfide or IB-IIIA selenides sulfide (namely absorbed layer is IB-IIIA chalcogenide, it is preferred to the chalcogenide of copper). Example includes Cu-In selenide, Copper indium gallium selenide, copper gallium selenides, copper and indium sulfide, copper indium gallium sulfide, copper gallium selenides, copper and indium sulfide selenides, copper gallium sulfide selenides and copper indium gallium sulfide selenides (it is all called CIGS in this article) more specifically. They can also use chemical formula CuIn(1-x)GaxSe(2-y)SyRepresent, wherein x be 0 to 1 and y be 0 to 2. Cu-In selenide and Copper indium gallium selenide are preferred. Except absorbed layer, described part 24 can also comprise multiple layer, such as known in the art for based on one or more transmittings (buffering) layer in the battery of CIGS, conductive layer (such as transparency conducting layer) etc., contemplating in this article. These batteries can be flexibility or rigidity, it is possible to has various shape and size, but usually frangible, and is prone to environment degradable. In preferred embodiments, photovoltaic cell 20 is to be bent and does not significantly ftracture and/or do not have the battery of notable loss function. Exemplary photovoltaic cell be taught and describe multiple United States Patent (USP)s and open in, including US3767471, US4465575, US20050011550A1, EP841706A2, US20070256734A1, EP1032051A2, JP2216874, JP2143468 and JP10189924A, in this case all purposes are incorporated by reference into.
In an exemplary embodiment, photoactive layer 24 can also be formed by any amount of layer structure further, such as: back contact 122 (being generally Mo), absorbed layer 124 (being generally CuInGaSe (S)), cushion 126 (being generally CdS), Window layer 128 (being generally ZnO) and transparency conducting layer 130 (being generally tin indium oxide (ITO) or aluminum zinc oxide (AZO)). It is believed that the battery 20 of this configuration is commonly called " CIGS solaode ", referring to Fig. 5 A-A.
Contemplate photovoltaic cell 20 to be formed by other known solar cells technology. Their example includes the solar battery apparatus based on amorphous silicon or cadmium telluride. Additionally, the parts in photovoltaic cell 20 as above can be used and can replace by material selection. Such as, cushion 126 can use Cd, Zn, In, Sn and the sulfide of combination, selenides or oxide to replace; The optional Window layer being made up of the resistance transparent oxide of such as Zn, Cd, In, Sn can be included between relief area 126 and transparency conducting layer 130. Under preferable case, Window layer is intrinsic zinc oxide.
Transparency conducting layer 130 can be configured so that the top layer of photoactive layer 24. Transparent conductive oxide or its combination widely can be mixed in the transparent conductive layer. In typical embodiments, transparency conducting layer 130 is transparent conductive oxide (TCO), and its representative example includes the stannum oxide of Fluorin doped, stannum oxide, Indium sesquioxide., tin indium oxide (ITO), aluminium-doped zinc oxide (AZO), zinc oxide, their combination etc. In an exemplary embodiment, transparency conducting layer is tin indium oxide. Transparency conducting layer can be easily formed by sputtering or other suitable deposition techniques.
Contemplate in some photovoltaic cell 20, it may not be necessary to independent transparency conducting layer 130. Such as, GaAs type battery is not usually required to transparent conductive body, because GaAs layer can conduct electricity fully. For purposes of the present invention, immediately layer below current collecting 28 should be considered the top surface 26 of battery 20.
These substitute the concept that it is known to the person skilled in the art that and do not affect battery in this paper interconnection.
Top current collecting 28
The function of top current collecting 28 is to collect the electric energy produced by light activatable moieties 22 and focused in conductive path. Current collecting 28 can be deposited over above photoactive layer 24 (such as on top surface 26) to reduce the sheet resistance of this layer (such as tco layer 130). Current collecting 28 typically comprises optically opaque material, and can apply (although it is also contemplated that other configurations as a series of substantially parallel conductive traces, and they need not the concept of fixing sound battery in this paper interconnection), wherein the interval between trace makes this grid occupy the area of coverage relatively small on surface. Such as, in certain embodiments, current collecting accounts for and makes light active material be exposed to catch about the 5% or lower of relevant total surface area to light in incident illumination, and even about 2% or lower, or even about 1% or lower. Current collecting 28 preferably includes conducting metal such as Ag, Al, Cu, Cr, Ni, Ti, Ta and/or its combination. In an exemplary embodiment, grid has the double-layer structural comprising nickel and silver. Current collecting can be formed by multiple technologies, such as evaporates including silk screen printing, ink jet printing, plating and use physical gas phase deposition technology or sputters the metallization undertaken by shadowmask.
Non-conductive layer part 30
Non-conductive layer part 30 plays insulator or dielectric effect, and the edge of conducting element 60 with solaode is electrically insulated by it. It is likely to by the generation contacting caused electrical short with conducting element 60 it is contemplated that the existence of non-conductive layer part decreases solar battery edge place. Additionally, non-conductive layer part 30 can play the effect of adhesive to be secured in place by multiple conducting elements 60 before applying encapsulating material layer during battery component manufacture. One of the leading edge or trailing edge of each single solaode in solar module or both places, it is possible to apply insulator to solaode or conductive member 60. Insulator can cross over the position of solar battery edge as discrete region formation along the edge of device at conducting element, or it can apply so that it can include the discrete layer between battery and conducting element 60 along the whole length at battery 20 edge or major part as single layer. Insulator can be able to the type as liquid deposition solidification or the crosslinking synthetic polymer to form solid material. Solidify or crosslinking can be realized by such as applying heat energy or ultraviolet (UV) energy. Compositions for UV-curable, it may be desirable to solidification process can complete within the short time period, for instance be shorter than 10 seconds, more particularly can be shorter than about 3 seconds. Many photo curable polymer need at least 300mJ/cm within the scope of 200-400nm2Energy, more typically about 500-1200mJ/cm2UV energy. Exemplary embodiment includes the compositions based on acrylate and epoxy resin. Alternatively, non-conductive layer part 30 can apply as solid material, for instance with the form of adhesive tape. The alternative being suitable for can include fluorocarbon polymer such as ethylene-tetrafluoroethylene copolymer (ETFE), the curable insulating polymer that can be coated on battery or interconnection material maybe can put on the Inorganic Dielectric Material on solaode or interconnection material. Contemplating it can also use the material such as polyethylene film as encapsulating material layer 40,50 to replace. In preferred embodiments, non-conductive layer part 30 is the liquid dielectric composition epoxy resin by UV radiation curing. In an exemplary embodiment, described part 30 is Kapton Tape. A kind of such commercially available adhesive tape is by DupontThe Kapton providedBand. In general, non-conductive layer part 30 can show the dielectric constant more than about 2, and even can more than about 4. Exemplary electrical insulant has the dielectric constant more than about 4.8 and more than about 3 �� 1014The specific insulation of ��-cm.
Conducting element 60
Conducting element 60 plays the effect of the electric bridge between photovoltaic cell 20. Contemplate formation electric bridge between top (such as current collecting 28 and/or top surface 26) and the conductive basal layer 26 of contiguous cells of a battery in the present invention. It is desirable that these elements have relatively low resistivity (being preferably shorter than about 1.0 ��/m, more preferably less than about 0.33 ��/m, it is most preferred that lower than 0.15 ��/m). Figure 11 illustrates the wire resistance rate example on the series resistance of battery component and the impact of normalization efficiency. They can be taked conventional metals wire (solid or coated), conductive foil, the polymer filament of coating or perform the form of any like structure of above-mentioned bridging functionality. Exemplary conducting element includes the copper cash being coated with Ag, Sn or Ni. Element 60 is without having the alloy (such as fusing point, lower than the desired processing temperature of battery component, is typically below about 200 DEG C) of relatively low fusing point, solder or conductive adhesive component.
Contemplate the conducting element 60 that each single battery uses number can be low to moderate two (2) (such as one on top, one on bottom) up to tens between change. The number of conducting element 60 and relative spacing can change along with many factors, such as: the type of element and resistivity, the size of battery 20, the type of current collecting 28 center line, resistivity and interval, the sheet resistance of top surface 26, the contact resistance of the interval of the discrete component of current collecting 28 and all related interfaces (such as current collecting/top surface, current collecting/conducting element, top surface/conducting element). These values can each measurement be used for determining preferred configuration, in order to minimizes overall power loss and balances the impact that the ohmic loss to the impact covering relevant power loss with related interfaces caused with current collecting by conducting element is correlated with. In preferred embodiments, every 100cm2The surface of battery 20 there are four (4) individual conducting elements 60, and they are approximately uniformly spaced apart (such as spacing value each other is within about 5 to 25%). Figure 12 minimizes the example of power loss (normalization efficiency) with illustrating how the optimization experiment by conducting element number.
It is contemplated that should there is the target (such as less than approximately 1.0 ��, be more preferably less than about 0.2 ��) contacting to meet resistivity fully between element 60 with conductive basal layer 22. It is envisioned that the lap " C of element 60 and conductive basal layer 22A" (referring to Fig. 4) can at little extremely about 2.0mm up in the scope of the whole width " W " of battery. In preferred embodiments, lap " CA" in the scope of about 2.0mm to 100.0mm, more preferably from about 5.0mm to 80.0mm, most preferably from about 20.0mm to 50.0mm.
It is contemplated that the cross-sectional width of the number of conducting element and conducting element can be chosen so that the overall power loss caused by the concealment of the line resistance of conducting element and conducting element is lower than about 3% to 6% according to following equation:
Overall power loss=[power loss caused by concealment]+[being lost the power loss caused by impedance line]
=[{ �� (I/n) (l) }/(V) (A)]+[n (l ') (d)]
Wherein �� is the resistivity of conducting element, I is the electric current produced by PV device, n is the number of conducting element, l is the length of conducting element, V is the voltage produced by PV device, A is the cross-sectional area of conducting element, and l ' is the length that conducting element covers the top surface of PV battery, and d is the diameter of conducting element.
In preferred embodiments, the cross-sectional width of conducting element can be about 0.1mm to 2.0mm, more preferably from about 0.2mm to 1.0mm, and most preferably from about 0.3mm to 0.5mm. In preferred embodiments, by covering the about 25-75%, more preferably from about 30-70% that the power loss caused can be the overall power loss caused by concealment and ohmic loss.
First encapsulating material layer 40
It is contemplated that the first encapsulating material layer 40 can perform several function. Such as, this layer 40 can play the effect of bonding mechanism, thus helping adjacent layer keeps together (such as battery 20, multiple conducting elements 60 and/or the second encapsulating material layer 50). It also allows for the light-transmissive of desired amount and type to arrive photovoltaic cell 20 (such as light activatable moieties 24). First encapsulating material layer 40 can also play the scrambling compensating adjacent layer geometry or pass through the effect of the scrambling (such as thickness change) that those layers show. It can also play the effect allowing to be moved and bent movement between the flexure and layer caused by environmental factors (such as variations in temperature, humidity etc.) and physics. Under preferable case, this layer 40 is configured to keep multiple conducting element 60 to electrically contact with top surface 26 and current collecting 28. In preferred embodiments, the first encapsulating material layer 40 can be substantially made up of adhesive foil or net, but is preferably thermoplastic such as EVA (ethane-acetic acid ethyenyl ester), TPO or similar material. It is contemplated that this layer 40 can be made up of simple layer, or can be made up of multilamellar (such as first, second, third, fourth, layer 5 etc.). When layer 40 is made up of multilamellar, it is contemplated to next-door neighbour's top surface (such as contacting with top surface 26, top current collecting 28 and conducting element 60) of battery and the ground floor that formed has than the fusion temperature (T higher with the second layer that next-door neighbour's ground floor is formedm). It is contemplated that this configuration can provide following advantage, namely can select processing temperature so that ground floor is not during heating treatment completely melted, but reach enough temperature so that ground floor adheres to battery top. This configuration prevents due to the loss contacted of conducting element that during heat treatment, between conducting element with top conductive layer, the underflow of encapsulating material causes with top conductive layer. The preferred thickness of this layer 40 can be about 0.1mm to 1.0mm, more preferably from about 0.2mm to 0.8mm, most preferably from about 0.25mm to 0.5mm. For multilamellar configuration, it is contemplated to this layer 40 should by fusion temperature (Tm) the different layers that difference is at least 10 DEG C constitute. Processing temperature should be selected as the T than ground floormLow about 5 DEG C or more and than the second layer TmHeight at least 5 DEG C. Such as, a kind of such combination can be made up of fusion temperature polylefin thermoplatic material within the scope of 105-130 DEG C ground floor and the second layer being made up of the EVA copolymer type that nominal fusion temperature is 50-100 DEG C.
It is contemplated that adhered to by " well " of encapsulating material layer with the absorption acquisition on all surfaces to be contacted is important for the integrity of maintenance package sealing assembly. As universal criterious, the adhesion measured with the absorption of glass should be higher than about 20N/15mm, more preferably above about 30N/15mm, and be even more preferably more than about 40N/15mm. Adhesion strength can use 180 �� of distraction tests of the standard as described in ASTMD903-98 to measure.
Second encapsulating material layer 50
In another example of encapsulating material layer, the second usual connectivity of encapsulating material layer 50 is placed in below photovoltaic cell 20, although it can directly contact the first encapsulating material layer 40 in some cases. Contemplate the second encapsulating material layer 50 and can play the effect similar with the first encapsulating material layer, although it is not necessarily to transmission of electromagnetic radiation or luminous energy. Under preferable case, the second encapsulating material layer 50 is configured to keep multiple conducting element 60 to electrically contact with conductive basal layer 22. When layer 50 is made up of multilamellar, it is contemplated to next-door neighbour's basal surface (such as contacting with conductive basal layer 22 and conducting element 60) of battery and the ground floor that formed has than the fusion temperature (T higher with the second layer that next-door neighbour's ground floor is formedm). It is contemplated that this configuration can provide following advantage, namely can select processing temperature so that ground floor is not during heating treatment completely melted, but reach enough temperature to cause ground floor to adhere to battery bottom. This configuration prevents by the loss contacted of the conducting element that during heat treatment, between conducting element with top conductive layer, the underflow of encapsulating material causes with conductive basal layer 22.
Embodiment
In paragraph below, illustrate five (5) individual embodiments and one (1) the individual comparative example of the present invention. There is provided the following examples to illustrate that the present invention, and be not intended to limit its scope.
Embodiment summation
For the purpose of these embodiments, from GlobalSolarInc CIGS type solaode (50mmX210mm) obtained the stainless steel-based end (such as conductive basal layer 22). Described battery is cut into less battery 50mm (" L ") X25mm (" W "). On the top surface 26 of the battery that Ni/Ag grid (such as current collecting 28) is applied on transparency conducting layer (ITO). In this case, 30 lines stride across the bigger dimension of battery. Near battery edge line until Mo layer (122) (such as from outer rim inwardly about 1.0 to 2.0mm) on battery 20. It is believed that the damage that cutting battery 20 causes, using such line is common in the industry.
Symbol herein defines as follows with writing a Chinese character in simplified form expression:
VOC=open-circuit voltage
ISC=short circuit current
FF=fill factor, curve factor
Eff=efficiency
RS=series resistance
Rsh=shunting (parallel connection) resistance
RP=Rsh
Pmax=power (watt)
JSCShort circuit current (the mA/cm of=per unit area2)
Embodiment 1
Two batteries with grid shown in Fig. 7 are used on all 4 edges polyimides (" kapton ") band (such as non-conductive layer part 30) is so that it winds and cover the mode of the dashed part on battery top around edge processes. Then by 3 silver-plated electric wire (30AWG; Such as conducting element 60) it is applied to the surface of battery A and extends to the bottom of battery B, use kapton band to be attached to by end partly (before applying encapsulating material 40,50) there at stainless steel-based the end. Take similar fashion, outside the wire of 3 30AWG stannum coating being applied to the surface of battery A and extending to battery edge. Wire applies with the direction vertical with the direction of the finger piece of silver grid. Do not use jointing material that electric wire adheres to battery surface (although can use fritter adhesive tape by element 60 stationary positioned until carry out lamination treatment). Then so that the stainless steel-based end of battery A can be used for the mode electrically connected by wire clamp with the electric wire extended to outside battery B, between the DNPPV-FSZ68 polythene strip (such as encapsulating material 40,50, not shown) of two battery components encapsulating 400 �� m-thick on the top and bottom. Then by DNP/ solaode/DNP assembly 150 DEG C of laminated. Current/voltage (I-V) characteristic of independent battery A and battery B and interconnecting assembly shows in fig. 13.
Embodiment 2
In the present embodiment, as shown in Figure 8, it is prepared for other two (2) the individual batteries 20 with grid, and adds them on two (2) individual batteries of embodiment 1. This battery is referred to as battery C and D. These batteries and the data summarization of battery C and D that links together are in fig. 13. Then use same method that battery component A+B and C+D is connected with each other to produce the string of 4 batteries.
The general introduction of the data of single battery A, B, C and D and interconnecting assembly shows in fig. 13.
Embodiment 3
In the present embodiment, five (5) the individual batteries 20 with grid it are prepared for as in the prior embodiments. In the present embodiment, as shown in Figure 9, ten (10) root silver-coated copper wire (30AWG are used; Such as conducting element 60) battery 20 is assembled in the way of end to end. Similarly, do not use jointing material that wire is adhered to battery surface. Battery 20/ element 60 assembly is so that the mode that wire extends to outside the edge of end cell is encapsulated between DNPPV-FSZ68 polythene strip (such as encapsulating material 40,50) on the top and bottom. Then Sn/Pb solder is used to be attached to by wire 60 on the copper busbar (" BB ") of stannum coating by soft soldering. Then by DNP/ solaode/DNP assembly 110 DEG C of laminated. The I-V characteristic of single battery and interconnecting assembly shows in fig. 14.
Embodiment 4
In the present embodiment, five (5) the individual batteries 20 with grid are prepared as in Example 3. As shown in Figure 9, battery 20 is assembled in the way of end to end, be distinctive in that 30AWG silver-coated copper wire (element 60) 28AWG stannum coating copper cash (element 60) replaces. The I-V characteristic of single battery and interconnecting assembly shows in fig .15.
Embodiment 5
Three (3) individual five (5) battery components are constructed in the way of similar to embodiment 3 and 4. In the present embodiment, grill designs has 14 lines striding across the bigger dimension of battery, and as shown in Figure 11, uses 8 28AWG tinned wirds to assemble in the way of end to end. The I-V characteristic of single battery and interconnecting assembly is summarized in Figure 17 A-C.
Embodiment 6 (comparative example)
The 5 battery GlobalSolar assemblies that conductive epoxy resin interconnects in conventional string-contact pin mode are used to be characterized by I-V measurement. Then pass through the band cut off between battery and described string is cut into 5 batteries, and obtain the I-V measured value of each battery. In Figure 16, the data of general introduction show, the performance of described string is substantially poor than single battery, and these data obtained with the battery connected by method described herein are contrary.
Embodiment 7 (comparative example)
Use several 5 battery GlobalSolar assemblies that conductive epoxy resin interconnects in conventional string-contact pin mode to be characterized by I-V measurements, then by the band between cut-out battery, described string is cut into 5 batteries as described in example 6 above. Use the method described in embodiment 3 that with 8 30AWG, 5 batteries are re-assemblied bunchiness. Obtain the I-V measured value of each battery. In Figure 16, the data of general introduction show, the performance of described string is substantially poor than single battery, and these data obtained with the battery connected by method described herein are contrary.
Method
It is contemplated that the method that photovoltaic cell 20 is assembled into assembly 10 is also creative. Imagination provides above-mentioned all parts, and the assemble method for manufacturing assembly 10 at least comprises the steps.
The first step can include the top surface 26 to each photovoltaic cell and apply multiple conducting element 60. Solaode in batch or offer in heaps, and can provide discharge point manually or automatically. Alternatively, solaode 20 to comprise the form offer of the volume continuously of multiple solaode, and can separate before being about to assemble in the step being referred to as singulation (singulation) from volume. It is cut into the solaode 20 of single can be provided in the bin (bin) according to photovoltaic performance classification. There is provided battery in bin by operator's individually manually load, or more preferably industrial robot can be used to sort out single battery from bin in situation, be placed in test zone. Then picture system can be used to instruct industrial robot accurately to be sorted out by photovoltaic cell and be placed on flat-top vacuum transport belt to be properly oriented within. In one embodiment, picture system includes the camera obtaining the picture of battery top surface, and the information accurately directed about battery is sent to robot so that robot can be sorted out and be placed on conveyer belt with pinpoint direction.
Battery 20 can move along with conveyer belt subsequently, during this period can near one or two edge of battery, as the liquid dielectric of thermal curable or UV-curable or apply non-conductive layer part 30 with adhesive tape form. If applying non-conductive layer with adhesive tape form, it is preferable that in situation, adhesive tape is the type comprising adhesive on two side faces, so that tacky surfaces can be used for contacting both the top surface 26 of battery and multiple conducting element 60.
When the battery with non-conductive layer part 30 transmits downwards along with conveyer belt, multiple conducting elements 60 can be applied on top surface 26 with conitnuous forms. Multiple conducting elements are fixed on the top surface of battery by the adhesion property that can utilize non-conductive layer part at two peripheral edge places. If non-conductive layer part is two-sided tape, then the adhesive on adhesive tape can be utilized to help to be secured in place multiple conducting elements. If non-conductive section is the liquid dielectric of UV-curable, then multiple conducting elements can partly be embedded in non-conductive layer part. Then liquid dielectric can be solidified to be fixed on the top surface of battery at two peripheral edge places by conducting element.
Said process creates continuous print battery " string ", plurality of conducting element contact top surface 26. Battery is separated enough gaps with outside allowing the conducting element of desired length to extend to the rear outer rim of each battery. This length is by the lap " C of element 60 desired in final products with conductive basal layer 22A" determine. Then can cut to produce the single battery with the multiple conducting elements outside the trailing edge contacting and extending to solaode with top surface 26 at the edge of each solaode by multiple conducting elements. Cutting process can be performed by mechanically actuated, for instance uses vice (nip), or uses laser at specific location wire cutting.
While manufacturing battery " string ", it is possible to manufacture in a similar fashion " string " of similar bus or end bar, plurality of conducting element attaches to multiple end bar by welding or soft soldering. In preferred embodiments, this process is fetched by Laser Welding and carries out. By conducting element cutting to produce to be attached with multiple conducting element and along the single end bar that extends dorsad.
After cutting conducting element in solar cells and end bar being processed, the end bar being attached with conducting element can pass through to pick up to be transported in interconnecting area with Placement Cell. Interconnecting area could be included for keeping the fixture of the second encapsulating material 50. End bar can be secured in place. Then the battery with the conducting element extended to outside trailing edge can be placed in the second encapsulating material layer, so that the multiple conducting elements outside extending to the trailing edge of end bar touch the back side of the first solaode. Then the second battery can be disposed so that multiple conducting elements outside extending to the trailing edge of the first battery contact the back side of the second battery. Repeat this process until the battery of desired amt is placed in interconnecting assembly. Then, the second end bar not being attached conducting element is fastened on the appropriate location on the second encapsulating material. The conducting element that use soft soldering or welding may extend to outside the trailing edge of last battery attaches to the second end bar. In preferred embodiments, this process is fetched by Laser Welding and carries out.
After completing end opposite and be attached with the interconnecting assembly of end bar, it is possible to the first encapsulating material 40 is placed on interconnecting assembly top. To have product lamination in such as vacuum laminator of the first encapsulating material layer, solaode, multiple conducting element and end bar, and thus complete assembly 10.
Unless otherwise stated, dimension and the geometry of the various structures being otherwise described herein as are not intended to limit the present invention, and other dimension or geometry are also possible. Multiple structure members can be provided by single overall structure. Alternatively, single overall structure can be divided into independent multiple parts. Although additionally, inventive feature is likely to have been described in the situation of only one exemplary, but such feature can combine with other features one or more of other embodiments and be used for any given application. From the discussion above it is also acknowledged that the manufacture of unique texture herein and operation thereof the method that also constitutes the present invention.
Have been disclosed for the preferred embodiments of the invention. But, those of ordinary skill in the art is it will be appreciated that some amendment will within the scope of the teachings of the present invention. Therefore, it should research claim below determines true scope and the content of the present invention.
Any numerical value enumerated in above-mentioned application includes all values of the incremental increase from smaller value to higher value with a unit, as long as being separated by least 2 units between any smaller value and any higher value. Such as, if mentioning the amount of certain component or the value of process variable such as temperature, pressure, time etc. be such as 1 to 90, preferably 20 to 80, more preferably 30 to 70, then it is intended that such as 15 to 85,22 to 68,43 to 51,30 to 32 equivalences are also explicitly recited in this specification. For the value less than 1, suitable situation next one unit is considered as 0.0001,0.001,0.01 or 0.1. These are only the example of numerical value of specifically intended instruction, and all possible combination of the numerical value between minimum and peak is all considered as stating clearly in this manual in a similar fashion.
Unless otherwise stated, all scopes include two all numerals between end points and end points. " about " or " being similar to " that use is combined suitable in two end values of described scope with scope. Therefore, " about 20 to 30 " are intended to cover " about 20 to about 30 ", and include the end points at least indicated.
The disclosure of all articles and list of references (including patent application and open) is that all purposes are incorporated by reference into.
For describe combination term " substantially by ... constitute " key element, composition, parts or the step that indicate and basic and other key elements this kind of of novel feature, composition, parts or the step of not this combination of substantial effect should be included.
The term " comprising " of the combination of description key element used herein, composition, parts or step or " including " are also covered by the embodiment being substantially made up of described key element, composition, parts or step.
Multiple key elements, composition, parts or step can be provided by single overall key element, composition, parts or step. Alternatively, single overall key element, composition, parts or step can be divided into independent multiple key elements, composition, parts or step. " one (a) " or " one " that be used for describing key element, composition, parts or step is not intended to get rid of other key element, composition, parts or step. Herein all denotions of the element or metal that belong to certain race are referred to and published and have the copyrighted periodic table of elements by CRCPress, Inc., 1989. Any denotion to one or more races should be the one or more races reflected as used IUPAC system to carry out race's numbering in this periodic table of elements.
Element number list
Photovoltaic cell component 10
Photovoltaic cell 20
Conductive basal layer 22
Photoactive layer 24
Top surface 26
Current collecting 28
Non-conductive layer part 30
First encapsulating material layer 40
Second encapsulating material layer 50
Conducting element 60
One end 62 of conducting element 60
The end opposite 64 of conducting element 60
Back contact 122
CuInGaSe (S) absorbed layer 124
Cushion 126
Window layer 128
Transparency conducting layer 130

Claims (13)

1. a photovoltaic cell component, comprising:
Multiple photovoltaic cells, described photovoltaic cell includes:
Light activatable moieties, it is interposed in:
Top conductive structure, described top conductive structure is located immediately at the top surface leaving exposure on some region of the top surface of described light activatable moieties on other regions, with
Between relative conductive basal layer; At least some of form peripheral edge portions of wherein said battery includes non-conductive layer part;
Multiple conducting elements;
The first encapsulating material layer directly contacted with the top surface of described top conductive structure and the exposure of described light activatable moieties; And
The second encapsulating material layer contacted with described relative conductive basal layer;
One end of wherein said multiple conducting element directly contacts the top surface of described top conductive structure and described exposure, and the described conductive basal layer of the end opposite contact adjacent photovoltaic cell of the plurality of conducting element, and two ends are all contacted with battery layers by the maintenance of corresponding encapsulating material layer;
Wherein said non-conductive layer part plays the effect of adhesive to be secured in place by the plurality of conducting element before applying described encapsulating material layer during described battery component manufacture so that described conducting element does not use conductive adhesive and/or solder to be connected to described photovoltaic cell element.
2. the photovoltaic cell component of claim 1, wherein said top conductive structure includes series of parallel line of material, it has the sheet resistance lower than the top surface of described exposure, and wherein said series of parallel line is generally orthogonal to the direction of the plurality of conducting element, and the parallel line of top conductive structure contacts with conducting element so that described conducting element forms the electric bridge between top conductive structure and the conductive basal layer of adjacent photovoltaic cell.
3. the photovoltaic module of claim 1, wherein said top conductive structure accounts for the 5% of the total surface area catching relevant light activatable moieties to light or lower.
4. the photovoltaic module of claim 1, the cross-sectional width of wherein said conducting element is more than the thickness of described first and second encapsulating material layer.
5. the photovoltaic module of claim 1, the cross-sectional width of wherein said conducting element is less than 0.5mm and more than 0.1mm.
6. the photovoltaic module of claim 1, wherein said conducting element is connected to the end connection strap at described assembly two ends place.
7. the photovoltaic module of claim 1, wherein said first encapsulating material layer and described second encapsulating material layer include multiple layer, and wherein the ground floor closest to battery top and lower surface is the thermoplastic with the fusing point higher than layer subsequently.
8. the photovoltaic module of claim 1, wherein said top surface comprises transparent conductive oxide.
9. the photovoltaic cell component of claim 1, wherein said photovoltaic cell component comprises at least 5 photovoltaic cells and at least 3 conducting elements contacted with each photovoltaic cell.
10. the photovoltaic cell component of claim 1, wherein said conducting element overlap on described conductive basal layer has the length of at least 2.0mm.
11. the photovoltaic cell component of claim 1, wherein said non-conductive layer part comprises the liquid dielectric by UV radiation curing.
12. the photovoltaic cell component of claim 1, wherein said first encapsulating material layer, described second encapsulating material layer or both comprise at least the first and second layers, wherein said ground floor has the fusion temperature (T higher than the described second layerm), and the overlap length that wherein said conducting element is on described conductive basal layer is 2.0mm to 100mm.
13. the method forming photovoltaic module, described method comprises the steps:
First encapsulating material layer and the second encapsulating material layer are provided;
Series of parallel conducting element is provided;
Multiple photovoltaic cell, described photovoltaic cell is provided to include photoactive layer, relative conductive basal layer and the top conductive layer comprising transparency conducting layer and current collecting;
One end of each conducting element of described series of parallel conducting element is directly contacted described transparency conducting layer and described current collecting;
The plurality of photovoltaic cell is connected the conductive basal layer that the end opposite of each conducting element of described series of parallel conducting element contacts adjacent photovoltaic cell in connected head-to-tail mode; With
The one end keeping each conducting element of described series of parallel conducting element directly contacts battery layers by described first encapsulating material layer with described second encapsulating material layer with end opposite;
Wherein said current collecting includes series of parallel line, and the form peripheral edge portions of described battery includes non-conductive layer part, and two ends keep directly contacting with battery layers by corresponding encapsulating material layer;
Wherein said non-conductive layer part plays the effect of adhesive to be secured in place by the plurality of conducting element before applying described encapsulating material layer during described battery component manufacture so that described conducting element does not use conductive adhesive and/or solder to be connected to described photovoltaic cell element.
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